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Smartphone移动开发—自己开发一个天气预报服务
作者：贺星河(hxhbluestar)
时间：2005-1-16
[文章导读]
本文介绍了在基于Smartphone操作系统的智能手机上开发一个天气预报服务的程序。
[简介]
我们都知道QQ有一个免费提供给Blog引用的天气预报服务网址http://appnews.qq.com/cgi-bin/news_qq_search?city=上海（上海是我自己所在城市，如果想看自己的城市，在浏览器中改成城市名称即可），现在我使用QQ提供的这个服务，将其包装部署为一个Web服务，并编写程序使得我的多普达565智能手机能使用这个Web服务。
[正文]
PC开发环境：Windows XP SP2，Visual Studio 2003.NET,.NET Framework 1.1 SP1
操作系统：Windows Mobile(TM) 2003第二版，版本4.21.1088(Build 14235.2.0.0)
智能手机型号：多普达565
一、安装必备的环境
注意：必须安装.NET Mobile所需要的开发环境
必须安装的软件(如下软件都是微软提供免费下载和使用的)
1、Microsoft ActiveSync 3.7.1
(最新版本Microsoft ActiveSync 3.8出来了，可以到摘要的页面中去找链接下载，这个我还没有试过)
下载网址：http://www.microsoft.com/windowsmobile/downloads/activesync37.mspx，里面有中文版本，或者，在手机附带的微软光盘里面有安装程序；
作用：同步手机和PC机数据的程序
2、Microsoft SMARTPHONE 2003 SDK.msi
下载网址：
http://download.microsoft.com/download/e/3/1/e310bb99-2f33-4d79-bb8a-41d9cb3c79b4/Microsoft SMARTPHONE 2003 SDK.msi
3、MobileAppDevToolkit2004.exe
下载地址：http://download.microsoft.com/download/b/2/5/b25742c0-daa3-4a8c-988d-a947a35e0a68/MobileAppDevToolkit2004.exe
二、将QQ的服务部署成WebService
1、建立一个名为WeatherService的WebService，并将QQ的天气服务转为XML WebService服务，部署在一台具有固定IP的服务器上。
2、新建一个WeatherDataSet.XSD，存储我们的天气信息
<?xml version="1.0" encoding="utf-8" ?>
<xs:schema id="WeatherDataSet" targetNamespace="Ezhi.Services.WeatherService" elementFormDefault="qualified"
attributeFormDefault="qualified" xmlns="Ezhi.Services.WeatherService" xmlns:mstns="Ezhi.Services.WeatherService"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xs:element name="WeatherDataSet" msdata:IsDataSet="true">
<xs:complexType>
<xs:choice maxOccurs="unbounded">
<xs:element name="WeatherDS">
<xs:complexType>
<xs:sequence>
<xs:element name="CityName" type="xs:string" minOccurs="0" />
<xs:element name="Date1" type="xs:string" minOccurs="0" />
<xs:element name="Weather1" type="xs:string" minOccurs="0" />
<xs:element name="Temp1" type="xs:string" minOccurs="0" />
<xs:element name="WindPower1" type="xs:string" minOccurs="0" />
<xs:element name="Date2" type="xs:string" minOccurs="0" />
<xs:element name="Weather2" type="xs:string" minOccurs="0" />
<xs:element name="Temp2" type="xs:string" minOccurs="0" />
<xs:element name="WindPower2" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>
3 WeatherService的源代码如下
#region Using directives
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Web;
using System.Web.Services;
using System.IO;
using System.Net;
using System.Text;
#endregion
namespace WeatherService
{
/// <summary>
/// Service1 的摘要说明。
/// </summary>
[WebService(Description="WeatherService 天气Service",Namespace="WeatherService")]
public class Weather : System.Web.Services.WebService
{
#region Variable
private string tommorow;
#endregion
#region 构造函数
public Weather()
{
InitializeComponent();
if(DateTime.Today.AddDays(1).Month.ToString().Length == 1)
{
tommorow= "0"+DateTime.Today.AddDays(1).Month.ToString()+"月" +
DateTime.Today.AddDays(1).Day.ToString()+"日";
}
else
{
tommorow= DateTime.Today.AddDays(1).Month.ToString()+"月" +
DateTime.Today.AddDays(1).Day.ToString()+"日";
}
}
#endregion
#region 组件设计器生成的代码
//Web 服务设计器所必需的
private IContainer components = null;
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if(disposing && components != null)
{
components.Dispose();
}
base.Dispose(disposing);
}
#endregion
#region [OK] GetWeatherDataSet 天气预报
[WebMethod(Description="天气预报")]
public DataSet GetWeatherDataSet(string cityName)
{
string url=@"http://appnews.qq.com/cgi-bin/news_qq_search";
string weatherData="";
try
{
weatherData = GetPage(url,cityName).Replace(" ","").Trim();
}
catch(Exception)
{
throw new Exception("对不起，没有这个城市的天气信息！");
}
//System.Diagnostics.Trace.WriteLine( tommorow );
//System.Diagnostics.Trace.WriteLine( weatherData );
WeatherDataSet weatherDs = new WeatherDataSet();
weatherDs.WeatherDS.AddWeatherDSRow(GetWeatherRow(ref weatherDs,weatherData,cityName) );
return weatherDs;
}
private WeatherDataSet.WeatherDSRow GetWeatherRow(ref WeatherDataSet weatherDs,string weatherData,string cityName)
{
WeatherDataSet.WeatherDSRow weatherRow = weatherDs.WeatherDS.NewWeatherDSRow();
weatherRow.CityName = weatherData.Substring(weatherData.IndexOf("●")+1,cityName.Length);
weatherRow.Date1 = DateTime.Now.ToLongDateString();
weatherRow.Weather1 = weatherData.Substring(weatherData.IndexOf("天气")+"天气".Length,weatherData.IndexOf("气温")-(weatherData.IndexOf("天气")+"天气".Length));
weatherRow.Temp1 = weatherData.Substring(weatherData.IndexOf("气温")+"气温".Length,weatherData.IndexOf("风力")-(weatherData.IndexOf("气温")+"气温".Length)).Replace("℃-","℃/");
weatherRow.WindPower1 = weatherData.Substring(weatherData.IndexOf("风力")+"风力".Length,weatherData.IndexOf(tommorow)-(weatherData.IndexOf("风力")+"风力".Length));
weatherRow.Date2 = DateTime.Today.AddDays(1).ToLongDateString();
weatherRow.Weather2 = weatherData.Substring(weatherData.LastIndexOf("天气")+"天气".Length,weatherData.LastIndexOf("气温")-(weatherData.LastIndexOf("天气")+"天气".Length));
weatherRow.Temp2 = weatherData.Substring(weatherData.LastIndexOf("气温")+"气温".Length,weatherData.LastIndexOf("风力")-(weatherData.LastIndexOf("气温")+"气温".Length)).Replace("℃-","℃/");
weatherRow.WindPower2 = weatherData.Substring(weatherData.LastIndexOf("风力")+"风力".Length);
return weatherRow;
}
#endregion
#region GetPageString 获取QQ的天气服务
//private string xx="";
[WebMethod(Description="天气预报")]
public string GetPageString(string cityName)
{
string url=@"http://appnews.qq.com/cgi-bin/news_qq_search";
return GetPage(url,cityName);
}
private static string GetPage(string url,string cityName)
{
HttpWebResponse res = null;
string strResult = "";
try
{
string postData = "city=" + HttpUtility.UrlEncode(cityName,System.Text.Encoding.GetEncoding("GB2312"));
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.KeepAlive = true;
req.ContentType = "application/x-www-form-urlencoded";
StringBuilder UrlEncoded = new StringBuilder();
byte[] SomeBytes = Encoding.ASCII.GetBytes(postData);
req.ContentLength = SomeBytes.Length;
Stream newStream = req.GetRequestStream();
newStream.Write(SomeBytes, 0, SomeBytes.Length);
newStream.Close();
//获得流内容
res = (HttpWebResponse)req.GetResponse();
System.IO.Stream s=res.GetResponseStream();
StreamReader reader = new StreamReader(s,System.Text.Encoding.Default);
strResult=reader.ReadToEnd();
}
catch(Exception e)
{
strResult = e.ToString();
}
finally
{
if ( res != null )
{
res.Close();
}
}
strResult=strResult.Remove(0,strResult.IndexOf("●"));
if( cityName != "北京" )
{
strResult=strResult.Remove(strResult.IndexOf("北京"),strResult.Length-strResult.IndexOf("北京"));
}
else
{
strResult=strResult.Remove(strResult.LastIndexOf("北京"),strResult.Length-strResult.LastIndexOf("北京"));
}
strResult=strResult.Trim();
while(strResult.IndexOf(@"<") != -1)
{
strResult=strResult.Remove(strResult.IndexOf(@"<"),strResult.IndexOf(@">")-strResult.IndexOf(@"<")+1);
}
while(strResult.IndexOf(@" ") != -1)
{
strResult=strResult.Replace(" ","");
}
string x = Encoding.UTF8.GetString(new Byte[]{10});
string y = Encoding.UTF8.GetString(new Byte[]{9});
while(strResult.IndexOf(x) != -1)
{
strResult=strResult.Replace(x,"");
}
while(strResult.IndexOf(y) != -1)
{
strResult=strResult.Replace(y,"");
}
return strResult;
}
#endregion
}
}
记得将在Web.Config文件加入以下节点，使得WebService能被外部访问
<!-- WebService 获取的途径 -->
<webServices>
<protocols>
<add name="HttpSoap"/>
<add name="HttpPost"/>
<add name="HttpGet"/>
<add name="HttpPostLocalhost"/æ
<add name="Documentation"/>
</protocols>
</webServices>
三、新建智能设备应用程序项目
1、新建一个智能设备应用程序，在主面板上拖放如图2所示的几个控件，其中timer是用来检查是否数据已经下载完毕的。
图1－新建智能设备应用程序
图2－界面设计
2、将建好的WebService引用进来
图3－引用WebServiceusing
3、WeatherService智能手机上运行的程序源代码
using System;
using System.Drawing;
using System.Collections;
System.Windows.Forms;
using System.Data;
namespace WeatherService
{
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